# Calculate the units of electricity consumed in the month of November form the following details. One 60 W bulb used for 5 hours daily. One 100 W bulb

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Calculate the units of electricity consumed in the month of November form the following details. One 60 W bulb used for 5 hours daily.
One 100 W bulb is used for 3 hours daily.
One 1 kW electric heater is used for 2 hour daily.
Also calculate the monthly bill at the rate of 2.50 per unit.

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Electric energy = electric power xx time
E = pt
(i) 60 W elecric bulb.
E_(b_(1)) = 60 W xx 5h = 0.06 xx 5 = 0.3 kWh
bulb consumes 0.3 units daily.
:. Energy consumed by the bulb for 30 days in the month of November E_(b_(1)) = 0.3 xx 30 = 9 kWh or 9 units.
(ii) 100 Welecric bulb.
(iii) Elecrtric heater
E_(b) = 1000 W xx 2h = 2 kW h = 2unit daily.
Electric used for 30 days, E_(h) = 2 xx 30 = 60 units.
Total energy consumed in the month of November is E_(b_(1)) +E_(b_(2)) + E_(b_(3))
= 9+9+60=78 units
The cost of electricity is ₹2.50 per unit.
Energy consumed is 78 units.
:. Monthly bill for November = 78 xx 2.50
= ₹195